<style>
.rt_content{background-color: #EAEDF1;}
</style>
<div class="base clearfix">
    <div class="fl base_left">
        <div class="base_model">左边第一板块</div>
        <div class="base_model">左边第二板块</div>
        <div class="base_model">左边第三板块</div>
    </div>
    <div class="fr base_right">
        <div class="base_model news">右边第一板块</div>
        <div class="base_model">右边第二板块</div>
        <div class="base_model">右边第三板块</div>
    </div>
</div>